工作场所空气中氢化锗的原子荧光测定法

Development of determination of germanium hydride in the air of workplace by atomic fluorescence

目的建立工作场所空气中氢化锗原子荧光测定方法。方法活性炭管采样，硝酸解吸过滤，原子荧光光谱仪检测。结果浓度在0．85～300．00μg／L范围内线性关系良好，相关系数r=0．9993；最低检出限和最低检出浓度为0．51μg／L和0．00017mg／m^3（以采集48L空气样品计），加标回收率为90％～106％；用相对标准偏差表示批内精密度为3．3％～5．9％，批间精密度为3．7％-6．3％。结论该方法线性范围宽，灵敏度高，精密度好，适用于工作场所空气中氢化锗的测定。

Objective An atomic fluorescence （AFS） method was developed to determine germanium hydride in the air of workplace. Method Germanium hydride in the air of workplace was collected by charcoal tube, and desorbed by nitric acid followed filtration with 0.22 μm cellulose filter, the AFS was used to determine Germanium in the desorbed solution. Results The linear was good at the range of 0.85-300 μg/L with the correlation coefficient of 0.9993; the LOD and LOQ were 0.51 μg/L and 0.000 17 mg/m^3, respectively. The recovery was ranged from 90% to 106%, the RSD of intra- and inter- precision were 3.3%-5.9% and 3.7% 6.3%. Conclusion The linear range, sensitivity and precision of the method were all satisfied for the determination of germanium hydride in the air of workplace.